Intermittent grip device.



No. 821,301. PATENTED MAY 22, 1906.

' D. E. LYMAN.

INTERMITTENT GRIP DEVICE.

APPLICATION FILED SEPT. 22. 1905.

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DWIGHT E. LYMAN, OF HARTFORD, CONNECTICUT.

INTERIVIITTENT GRIP DEVICE.

Specification of Letters Patent.

Patented May 22, 1906.

Application filed September 22, 1905. Serial No. 279,667.

To all whom it may concern.-

Be it known that I, DWIGHT E. LYMAN, a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented a new and useful Intermittent Gr p Device, ofwh. ch the following is a specification.

This invention relates to improvements in clutches of that descriptionby wh ch the rotary movement of one member of a mechanism looselymounted upon a shaft may be transmitted to another member of themechanism secured to the shaft to effect the rotation of the shaft.

One object of my improvements i s to provide a clutch by whichcontinuous rotary movement in one direction only may be transmitted tothe shaft from the member loosely mounted thereon,wh le movement of theloose memberin the opposite direction will not actuate the shaft.

Another object of my mprovements is toprovide a clutch by wh ch a v.bratory movement of the member loosely mounted upon the shaft w lleffect the stepwise rotation of the shaft in one direction.

Another object of my invention s to provide, with a clutch capable oftransmitting the continuous rotary movement of the member looselymounted upon the shaft to the shaft in one direction only and alsocapable of transmitting the vibratory movement of the member looselymounted upon the shaft to effect the stepwfserotat-on of the shaft,addit onal devices for at w ll actuating said clutch and for at w llinterrupting the actuat on of the clutch.

Another object of my invention is to provide means for adjusting thedevices for actuating the clutch. v

These objects are atta'ned by mechanism of s'mple and practicalconstruction whi ch i s efficient, properly incased for :7 ts protecton, and not liable to get out of order.

The embodiment of my improvements represented in the accompanyingdraw'ngs t' s the feed mechanism of a mach ne for head ng rivets orscrews; but t will be understood that I do not ntend to restrict thepresent invent on to a feed mechanism, nor to any particular k nd ofmachne, nor to the comb'naton of the several features in a singlestructure.

In the accompany'ng drawings, Figure 1 is a front elevation of a screwor r'vet heading machine, showing the feed mechanism embody'ng myinvention partly in vertical central section. Fig. 2 is a side elevationof the forward portion of the machine. Fig. 3 is an end vf ew of thepart of the clutch fixed to the shaft, detached, exposing to view theinterior thereof and the cam-d sk contained therein. Fig. 4 is a simflarend view of the part of the clutch-casing loosely mounted on the shaftand thefrIction-ring conta ned there'n. Fig. 5 represents the cam-shaft,cam, and lever, detached, in a side and i n an end view.

S'm lar letters refer to sim lar parts throughout the several views.

The left-hand end of the lower shaft of the. feed mechanism representedin the drawings projects some distance beyond the bearing in the uprightI), and upon this part of the shaft a s mounted the mechanism foreffecting the stepwise rotation of the two shafts in the dimotion fordrawing in the wire between the feed-wheels d d-.

Upon the end of the shaft a a slide-box e is loosely seated, the lowerend of the slide-box forming a hub e, fitted to freely turn on theshaft, and a cap-disk fixed to the end of the shaft a, holding theslide-box e u on the shaft.- In the slide box 6 the s ide f is seated,being of rectangular form and its upper semicircular end-projectingabove the top of the slide-box. The rounded top of the slide f isbifurcated and fitted with a hori- Zontal pivot-pin f, parallel to theshaft a. On its front near the lower end the slide f carries aprojecting semicircular boss f through which a vertical thread ed holeasses. A cap-plate 6 secured by screws to the front of the slide-box e,closes the same and secures the slide f therein, while allowing it tofreely move vertically in the box. A forward projection on the cap-platee incloses the l'TOSSf of the slide and provides clearance above theboss for the vertical adjustment of the slide The slide-box e isprovided in front of the hub c with a semicircular boss e which isvertically in line with and forms a downward continuation of theprojection on the cap-plate 6 the boss 6 extending vertically downwardand some distance below the hub c, this lower extension beingcylindrical. In the boss 6 the slide-box carries the adjusting-screw g.The lower smooth portion of the screw passes through the boss, and belowthe boss a handle 9 is fastened upon the screw g and serves at will toturn the same. Recessed into the top of the boss 0 the screw 9 carries afixed collar of the shaft (1.

In the central recess of the projecting bifurcated u per end of theslidef the forward end 7/ of t e connecting-rod h is pivotally attachedby the pivot-pin f thus forming a knuckle-joint between the rod and theslide, the rear end of the connecting-rod being connected, as usual, tothe crank-pin on the end of the main driving-shaft of the machine.Rotation of the driving-shaft and crank produces a forward and rearwardmovement of the end h of the connectingrod, and this produces avibratory forward and rearward movement of the slide f and slide-box onthe shaft a as fulcrum. By turning the handle g and the adjustingscrew 9and raising or lowering the slide and the pivot-pinf the limits of thevibratory movement of the slidebox upon the shaft may be adjusted, forthough the amount of movement transmitted by the connectingrod to theend of the slide f remains the same the lengthening or shortening of theradial distance of the knuckle-joint, the point of transmission abovethe shaft a, results in shortening or lengthening the arc through whichthe slide-box is vibrated. The transmission in one direction of thisadjustable vibratory movement from the slide-box to the shaft a and tothe shaft a and to the feedwheels thereon results in adjusting thelength of the wire fed at each step of rotation by the feed-wheels tothe mechanism of the machine.

As far as described the parts of the machine and their operations arethe usual ones and do not vary from those of well-known feed mechanismsof machines of this class, and they do not require to be furtherdescribed or illustrated, as the present invention resides exclusivelyin the improved means for transmitting the movement from the slide-boxto the shafts. Heretofore this object has been usually attained bysecuring a ratchet-wheel upon the shaft a at the side of the slide-box eand by providing a pawl or a series of pawls pivoted to the side of theslide-box over theratchet-wheel. By turning the pawl into the operativeposition, in which its free end engages the teeth of the ratchet-wheel,the movement of the slide-box would be transmitted to the wheel and tothe shaft in one direction, and this transmission could be at willinterrupted by raising the pawl out of contact with the wheel andsecuring it in the inoperative position. This construction has severalobjectionable fea cess.

tures. It cannot be applied without being subject to more or less lossof motion between the pawl and the wheel, it is not readily and easilychanged while in motion from the operative to the inoperative position,and being entirely open and exposed it is liable to become clogged orinjured. All of these drawbacks are entirely overcome by thesubstitution of my improved friction-clutch.

The clutch comprises two parts, of which one is loose and the otherfixed on the shaft (1. Both parts are inclosed in a casing and mountedside by side upon the shaft on between the slide-box e and the upright1). Nearest to the upright b the flange i is secured upon the shaft a, aspline seated in the shaft a and fitting in the hub t of the flange,holding the flange against rotation on the shaft. Upon the outside ofthe hub i a disk is seated and secured by screws j to the flange i. Inthe periphery of the disk a series of recesses equal distances apart iscut, one end of each recess being substantially radial and the bottom ofeach recess extending at substantially a right angle from the radial endof the recess to the periphery of the disk. In looking at the disk fromthe left end of the shaft the bottom of each recess extends to the leftside, as clearly shown in Fig. 3. While I have shown. and described thedisk j as separate from the flange i and fastened thereto, the disk maybe integral with the flange; but I prefer to make it separate on accountof its being easier to manufacture. In each of the recesses in the diska roller is is provided of a diameter which allows it to freely turn inthe recess when near the radial end thereof; but if it is moved towardthe left side upon the bottom of the recess the roller is caused toproject beyond the periphery of the disk, and therefore to bind againstany inclosing circular rim by which the disk j may be surrounded.Central in the radial end of each of the recesses in the disk y'a holeis bored, penetrating some distance into the disk and forminga seat fora spiral spring Z. The inner end of the spring rests against the bottomof the hole, while the outer end of the spring rests against the roller7c. Thus the. spring tends to force the roller away from the radial endof the recess and toward the shallower part of the re- At the left sideof the flange i and between it and the slide-box e the clutch-casing misloosely mounted upon the shaft a. The

outer rim of the casing m incloses the cam' disk and adjoins the flange'i, the outside diameter of the rim being equal to that of the flan e.

Iii the center of the clutch-casing m is a transverse partition m, whichis seated loosely upon the shaft a at the left of the camdisk j and ofthe hub 'L of the flange *5. Between this partition and the slide-box ethe clutch-casing forms a chamber in which the expansible friction-ringn is seated, and at the left side this chamber is closed by the circularcover-plate m which, like the partition m, is loosely fitted upon theshaft a. The friction-ring a, seated in the chamber of the casing m, isdivided into two segmental parts. (See Fig. 4.) On one side of itscenter the ring is divided by a narrow radial cut, and a setscrew 0 isfitted into one of the segments of the ring at right angles to the cut,and so that the end of the screw obears against the end of the othersegment of the ring. By turning the screw 0 the divided ring may beadjusted so as to closely fit in the chamber of the clutch casing, butso as not to exert friction against the rim surrounding said chamber. Atthe opposite side the friction-ring n is divided by a somewhat widercut, and in itbetween the ends of the segments of the ring a cam 22 islo cated. This cam is an integral part of the cam-shaft p, which extendsfrom the clutchcasing m toward the outside of the slide-box c. A bearingfor the cam-shaft p is provided in the slide-box on a line with andparallel to the bearing therein of the shaft and at a sufficientdistance from the same to locate the cam 19 between the ends of thesegments of the friction-ring 'n. To the outer end of the cam-shaft p ahub q and a hand-lever 1" are attached, by means of which the cam-shaftand the cam may be turned about ninety degrees on their axis. The endsof the segments of the friction-ring '11. above and below the cam 19have shallow recesses into which the cam enters when by turning theshaft and hand-lever it is turned to the operative position.

From the foregoing detailed description of the construction of themechanism its operation will be readily understood. When the parts arein the position shown in the drawings and the hand-lever 1" stands intheraised position, the cam is in the operative position, in which itexpands the friction-ring, so that the vibratory or rocking movementimparted by the connecting-rod to the slide-box and by it to thecam-shaft, cam, and friction-ring is transmitted by the ring to theclutch-cas ing m, because the expanded friction-ring bears firmlyagainst the casing. The springs Z pressing the rollers 7c toward theshallow ends of the recesses in the cam-disk j, the rollers constantlybear against the rim of the clutch-casing m surrounding them, and whenthe casing rocks in the direction toward the shallow ends of therecesses in the disk the rollers, wedging between the casing and disk,will at once cause the disk to be rotated with the casing, and the diskand flange i being fixed on, the shaft a the shafts a and a will berotated a step in the direction to cause the feed-wheels (Z d to feedthe wire into the machine. When, however, on the reversed movement theslide-box, cam-shaft, cam, friction-ring, and clutch-casing rock in theopposite direction, the movement of the rim of the casing turning therollers toward the deepest part of the recesses in the cam-disk at oncecauses the rollers to be freed and to release their wedging hold uponthe rim of the casing and upon the cam-disk j, and thus al lows thecasing to move while the disk j, flange "L, and. shaft to stand still.In this manner the vibratory movement of the slide-box is communicatedto the shaft a stepwise in one direction. On depressing the handle ver1" to the position. indicated by dotted lines in Fig. 2 the cam p ismoved to the inoperative position between the ends of the segments ofthe ring n, the friction-ring n, no longer expanded, releases its holdupon the clutch-casing, the casing stands still, and movement ceases tobe transmitted to the disk j, flange 't, and shafts a and a until thehand-lever is again raised. The raising of the hand-lever is mostconveniently effected while the slide-box rocks toward the right hand,the movement in this direction partly turning the handle upward if thesame is simply prevented from rocking with the box.

As the rocking of the slide-box toward the right is the part of thevibratory movement which is not communicated to the shafts of themachine, as heretofore explained, this arrangement insures that theclutch is thrown into action before theoperative vibration toward theleft begins and that the shafts a and a will receive the full movementin that direction required in order that the feedwheels will feed theregular length of wire to the machine. This arrangement prevents thefirst rivet or screw blank fed to the machine from being shorter thanthe regular length, a disturbing occurrence liable to, happen if thefeed mechanism were thrown into action while the slide-box rocks towardthe left side-t. 6., during the part of the movement to be transmittedby the clutch to the shaft.

While I have shown and described the two parts of the friction-clutch,the cam-disk, and the expansible frictionring in cooperation, it isevident that these parts may be independently appliec The cam-disk androllers fixed upon a shaft may be employed to transmit a continuousrotary movement in one direction to the shaft from a rim surrounding therollers and disk. Said rim may be part of a pulley loosely mounted uponthe shaft and rotated thereon by the side of the flange 'i and diskWhile I have shown and described a series of six recesses and rollersarranged in the periphery of the disk j, this number may be varied, onerecess and cient to frictionally interlock the rim of the casing withthe disk and flange in one direction; but by providing a series ofrecesses and rollers, as shown, the strain is symmetrically dividedbetween all parts and a minimum amount of wear results.

roller even being sufli- A specially effective feature of my improvementconsists in the arrangement of the spiral springs and their action uponthe rollers in the recesses of the disk. Without the springs the actionof the rollers would have to depend upon gravity for moving them towardthe shallow parts of the recesses, and as this could be the case onlywith those rollers located on one side of the shaft 0 a small fractiononly of the total number of rollers could be actuated and the entirestrain would be thrown upon the parts on one side of the shaft. Thesprings will cause the rollers in all positions to be moved intooperation, thus insuring quicker and more certain operation and dividingthe strains symmetrically between all parts.

It will be seen that all parts of the clutch and of the means foractuating it are most perfecly incased and protected from disturbance orinjury.

What I claim, and desire to cover by Letters Patent, is

1. The combination, with a shaft, of a clutch, comprising afriction-casing loosely mounted on the shaft, said casing having afriction-rim and a chamber, a disk secured to the shaft, and inclosed bysaid friction-rim, and carrying automatic means for interlocking saiddisk with said friction-rim in one direction, and an expansible andadjustable friction-ring seated in said chamber, a box loosely mountedfor rotation 011 said shaft by the side of said clutch, said boxcarrying means for expanding said friction-ring and for rotating thesame, whereby vibratory movement imparted to said box may be transmittedto stepwise rotate said shaft in one direction.

2. The combination, with a shaft, of a clutch, comprising a casinglooselymounted on the shaft, said casing having a friction rim and achamber, a disk secured to the shaft'and inclosed by said friction-rimand carryin automatic means for interlocking said dis with saidfriction-rim in one direction, and a friction-ring seated in saidchamber, means carried by said friction-ring for adjusting the same, abox loosely mounted on said shaft by the side of said clutch, said boxcarrying means for expanding said friction-ring and for rotating thesame, whereby Vibratory movement imparted to said box may be transmittedto stepwise rotate said. shaft in one direction.

3. The combination, with a shaft, of a clutch, comprising a casingloosely mounted on the shaft, said casing having a frictionrim, and achamber, a disk secured to the shaft and inclosed by said friction-rimand carrying automatic means for interlocking said disk with saidfriction-rim in one direction, and a friction-ring seated in saidchamber, a set-screw in said friction-ring for adjusting the same, a boxloosely mounted on said shaft by the side of said clutch, said boxcarrying means for expanding said frictionring and for rotating thesame, whereby vibratory movement imparted to said box may be transmittedto stepwise rotate said shaft in one direction.

4. The combination, with a shaft, of. a clutch, comprising a casingloosely mounted on the shaft, said casing having a frictionrim and achamber, a disk secured to the shaft, and inclosed by said friction-rim,and carrying cam-recesses and rollers for interlocking said disk withsaid friction-rim in one direction, and a friction-ring seated in saidchamber, a box loosely mounted for rotation on said shaft by the side ofsaid clutch, said box carrying means for expanding said friction-ringand for rotating the same, whereby vibratory movement imparted to saidbox may be transmitted to stepwise rotate said shaft in one direction.

5. The combination, with a shaft, of a clutch, comprising a casingloosely mounted on the shaft, said casing having a frictionrim and achamber, a disk secured to the shaft, and inclosed by said friction-rim,and carrying cam-recesses and rollers and springs for holding saidrollers in operative position'for interlocking said disk with saidfriction-rim in one direction, and a friction-ring seated in saidchamber, a box loosely mounted for rotation on said shaft by the side ofsaid clutch, said box carrying means for expanding said friction-ringand for rotating the same, whereby vibratory movement imparted to saidbox may be transmitted to stepwise rotate said shaft in one direction.

6. The combination, with a shaft, of a clutch, comprising a casingloosely mounted on the shaft, said casing having a frictionrim and achamber, a disk secured to the shaft and inclosed by said friction-rimand carrying cam-recesses and rollers for interlocking said disk withsaid friction-rim in one direction, and a friction-ring seated in saidchamber, means carried by said friction-ring for adjusting the same, abox loosely mounted on said shaft by the side of said clutch, said boxcarrying means for expanding said friction-ring and for rotating thesame, whereby vibratory movement imparted to said box may be transmittedto stepwise rotate said shaft in one direction.

7. The combination, with a shaft, of a clutch, comprising a casingloosely mounted on the shaft, said casing having a frictionrim and achamber, a disk secured to the shaft and inclosed by said friction-rimand carrying cam-recesses and rollers and springs for holding saidrollers in operative position for interlocking said disk with saidfrictionrim in one direction, and a friction-ring seated in saidchamber, means carried by said friction-ring for adjusting the same, abox loosely mounted on said shaft by the side of said clutch, said boxcarrying means for expanding said friction-ring and for rotating thesame, whereby vibratory movement imparted to said box may be transmittedto stepwise rotate said shaft in one direction.

8. The combination, with a shaft, of a clutch, comprising a casingloosely mounted on the shaft, said casing having a friction rim and achamber, a disk secured to the shaft and inclosed by the friction-rimand carrying cam-recesses and rollers for interlocking said disk withsaid friction-rim in one direction, and a friction-ring seated in saidchamber, a set-screw in said friction-ring for adjusting the same, a boxloosely mounted on said shaft by the side of said clutch, said boxcarrying means for expanding said friction-ring and for rotating thesame, whereby vibratory movement imparted to said box may be transmittedto stepwise rotate said shaft in one direction.

9. The combination, with a shaft, of a clutch, comprising a casingloosely mounted on the shaft, said casing having a frictionrim and achamber, a disk secured to the shaft and inclosed by said friction-rim,and carrying cam-recesses and rollers and springs for holding saidrollers in operative position. for interlocking said disk with saidfrictionrim in one direction, and a friction-ring seated in saidchamber, a set-screw in said friction-ring for adjusting the same, aboxloosely mounted on said shaft by the side of said clutch, said boxcarrying means for expanding said friction-ring and for rotating thesame, whereby vibratory movement imparted to said box may be transmittedto stepwise rotate said shaft in one direction.

10. The combination, with a shaft, of a box loosely mounted on theshaft, a rod pivotally connected with said box, a frictioncasing looselymounted on said shaft, and a disk secured to said shaft, saidfriction-easing having a rim surrounding said disk, and having a chambercontaining a friction-ring, means carried by said box for rotating saidfriction-ring, and automatic means carried by said disk for interlockingsaid disk with said friction-casing in one direction, whereby vibratorymovement imparted to said box by said rod will stepwise rotate saidshaft in one direction, substantially as and for the purpose specified.

11. The combination, with a shaft, of a slide-box loosely mounted on theshaft, a slide supported in said slide-box, a rod pivotally connectedwith said slide, a friction-casing loosely mounted on said shaft, a disksecured to said shaft, said friction-casing hav ing a rim surroundingsaid disk and having a chamber containing a friction-ring, automaticmeans for interlocking said disk with said friction-casing in onedirection, operative connection of said slide-box with thefriction-ring, whereby vibratory movement imparted to said slide-box bysaid rod will stepwise rotate said shaft in one direction, substantiallyas and for the purpose described 12. The combination, with a shaft, or aslide-box loosely mounted on the shaft, a slide supported in saidslide-box, a screw for adjusting said slide in sa d box, a rod pivotallyconnected with said slide, a frictio-ncasing loosely mounted on theshalt, a disk secured to said shaft, said friction-casing having a rimsurrounding said disk and having a chamber containing a friction-ring,operative connection of said slide-b ox with the frict on-ring,automatic means for interlocking said disk with said friction-casing inone direction, whereby vibratory movement imparted to said slide-box bysaid rod will transmit adjustable stepwise rotation to said shaft in onedirection, substantially as and for the purpose specified.

13. The combination, with a shaft, of a slide-box loosely mounted on theshaft, a slide supported in said slide-box, a screw for adjusting saidslide in said box, a rod pivotally connected with said slide, afriction-casing loosely mounted on the shaft, a disk secured to saidshaft, said friction-casing having a rim surrounding said disk andhaving a chamber containing a friction-ring, operative connectionof'said slide-box with the frictionring, cam-recesses and rollers insaid disk for interlocking said disk with. said friction-casing in onedirection, whereby vibratory movement imparted to said slide-box by saidrod will transmit adjustable stepwise rotation to said shaft in onedirection, substantially as and for the purpose specified.

14. The combination, with a shaft, of a slide-box loosely mounted on theshaft, a slide supported in said slide-box, a screw for adjusting saidslide in said box, a rod pivotally connected with said slide, afriction-casing loosely mounted on the shaft, a disk secured to saidshaft, said friction-casing having a rim surrounding said disk andhaving a chamber containing a friction-ring, operative connection ofsaid slide-box with the friction-ring, cam-recesses and rollers andsprings for moving said rollers into operative position in said disk,for interlocking said disk with said friction-casing in one direction,whereby vibratory movement imparted to said slide-box by said rod willtransmit adj ustable stepwise rotation to said shaft inone direction,substantially as and for the purpose specified.

15. The combination, with a shaft, of a slide-box loosely mounted on theshaft, a slide supported in said slide-box, a rod pivotally connectedwith said slide, a frictioncasing loosely mounted on said shaft, a disksecured to said shaft, said friction-casing having a rim surroundingsaid disk and having a chamber containing a friction-ring, automaticmeans for interlocking said disk with ISO said friction-casing in onedirection, a cam and a cam-shaft carried by said slide-box for expandingand rotating said friction-ring, whereby vibratory movement imparted tosaid slide-box by said rod will stepwise rotate said shaft in onedirection, substantially as and for the purpose described.

16. The combination, with a shaft, of a slide-box loosely mounted on theshaft, a slide supported in said slide-box, a screw for adjusting saidslide in said box, a rod pivotally connected with saidaslide, afriction-casing loosely mounted on the shaft, a disk secured to saidshaft, said friction-casing having a rim surrounding said disk andhaving a chamber containing a friction-ring, a cam and cam-shaft carriedby said slide-box for expanding and rotating said friction-ring,automatic means for interlocking said disk with said friction-casing inone direction, whereby vibratory movement imparted to said slide-box bysaid rod will transmit adjustable stepwise rotation to said shaft in onedirection, substantially as and for the purpose specified.

17. The combination, with a shaft, of a slide-box loosely mounted on theshaft, a slide supported in said slidebox, a screw for adjusting saidslide in said box, a rod pivotally connected with said slide, afriction-casing loosely mounted on the shaft, a disk secured to saidshaft, said friction-casing having a rim surrounding said disk andhaving a chamber containing a friction-ring, a cam and cam-shaft carriedby said slide-box for expanding and rotating said friction-ring,cam-recesses and rollers in said disk for in terlocking said disk withsaid friction-casing in one direction, whereby vibratory movementimparted to said slide-box by said rod will transmit adjustable stepwiserotation to said shaft in one direction, substantially as and for thepurpose specified.

18. The combination, with a shaft, of a slide-box loosely mounted on theshaft, a

slide supported in said slide-box, a screw for adjusting said slide insaid box, a rod pivotally connected with said slide, a friction-casingloosely mounted on the shaft, a disk secured to said shaft, saidfriction-casing having a rim surrounding said disk and having a chambercontaining a friction-ring, a cam and cam-shaft carried by saidslide-box for expanding and rotating said friction-ring, cam-recessesand rollers and springs for moving said rollers into operative positionin said disk, for interlocking said disk with said friction-casing inone direction ,whereby vibratory movement imparted to said slide-box bysaid rod will transmit adjustable stepwise rotation to said shaft in onedirection, substantially as and for the purpose specified.

19. The combination, with a shaft, of a clutch comprising a disk securedto the shaft and having cam-recesses and rollers and springs to holdsaid rollers in operative position in the recesses, a casing loose onthe shaft and having a friction-rim surrounding said disk and rollers,and having a closed chamber, a friction-ring seated in said chamber, anda cam carried in said chamber for expanding and rotating saidfriction-ring, a box loosely mounted by the side of said clutch on saidshaft, and carrying a cam-shaft and a hand-lever for turning said cam,whereby rotary movement imparted to said box may be transmitted in onedirection to said shaft, and whereby all operative members of saidclutch and the means for actuating said clutch, with exception of saidhand-lever, are covered and incased.

20. The combination, with a shaft, of a clutch comprising a disk securedto the shaft and having cam-recesses and rollers and springs to holdsaid rollers in operative position in the recesses, a casing looselymounted on the shaft and having a friction-rim surrounding said disk androllers, and having a closed chamber, a friction-ring seated in saidchamber, and a cam carried in said chamber for expanding and rotatingsaid friction-ring, a box loosely mounted by the side of said clutch onsaid shaft, and carrying a camshaft and a hand-lever for turning saidcam, whereby, on raising said hand-lever, rotary movement imparted tosaid box will be transmitted in one direction to said shaft.

This specification signed and witnessed this 18th day of September, A.D. 1905.

DWIGHT E. LYMAN.

In presence of C. J. EHBETs, K. POWERS.

